My issue is comparable to the prior entry of lkstreich (May 2022) regarding replace admin not working. I wish to update (change) my admin email account as the current email address is being sunset. I have created a new account as specified, which I have confirmed through login, but when I enter that new email address into the Replace Admin field and submit, I get the "User not found" error. Misaligned case does not appear to be an issue as you can only enter lower case characters at this point. So to confirm, I have two active Hubitat accounts and neither is listed as a guest account, yet I can't make the update. Please advise.
We haven’t been able to reproduce this particular issue in our testing, before. While it appears to be very rare, I understand how frustrating it can be when it affects you. Please submit an account support request by visiting this page: Account Issues – Hubitat Support
Be sure to include both accounts in your comment.